1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beb6534052d98247cc2dcd4f55627bc9a26bb7fab2fc8fe187ee593864870d4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4116b1cf-5d62-4358-a991-cb2240f44c74.json and https://artists.proofprofile.net/proofs/artist/4116b1cf-5d62-4358-a991-cb2240f44c74.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc7499bd666ace05418a638c2db02cc167088da9a99e601596a44e84ca1c689. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2352162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23c275406e1d597570bdbc4beeb4c12b1cc4648c25c72487fe09d564dd9bb53. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:58:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN72311388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3c0add297158880ab780354be0a1ab07b8ff2c7ec652182d6937edce1a5f70. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZRP42312798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f1f6d918c18f13e940f725d84e8b02222bec277a1d99fc55cf3efdd3ff1143. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:58:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFM2320686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14482c7b1d4f221424d84c7acc47a7b04f458f327269f0174b9c5667bf59c330. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6H2420499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e528e53e258021c1c7afe5d9d5c657254f23863d2f22ddf060030b1e17ec5b7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2427685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6d0f4df92437829235cc8d06cd1b9f793784cfcbdaaaa9b4637000313611d1. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAS2491155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7406270ac5863fcc6c11e707411f9f6b6826a920e66ea73f17c2638439046981. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAS2491156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049c2a180b41d5fe066e31060b963782ae2669bc047651e11fdd1f11f82c5457. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAS2491157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9162a4d064173c7f530b60403451c0a37c390d685320d8d3002f573731b3a1. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAS2491158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bb1ac50cbb3eac979c89ac3c9b5bde63c0c5cc472f3a5a454c893fbf7342b4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6N22493299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356d0dfdd1f0c6497ab2b51c9b9364ea626cd73fd7a7bcfbc3102df07b379182. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6N22493314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25c41b094303f4a6789bfb5f3e4ad416b39573839baa149bfa94d36decfc083. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZXT2454103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec37cacc1f5b3c91f11bb7188db5ca1feac52b382ab1a8213f94e3e53493791. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBARL2301728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7092819318447debdcc44902015e241c3e16a79b57d29b672a2235691492f10f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBARL2301731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9f89148584a283d470202224e7a1bcfb9c11d1b5d7721b3e48a147e1b68cde. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SGB502542079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb775c36261a12a5b83edbd1f7475ee3ecb6ea11cd3274eded209f7844b1c5760. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELV42500263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf274d737972094f19745ebe8416cdf73a08f72f7937bb01c88b6f8c4aef06f68. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELV42500281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdafd2bd71963e2fadb600a2790d0e352923db004359b8bd5cf42527d47fae79. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELV42500275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb775c36261a12a5b83edbd1f7475ee3ecb6ea11cd3274eded209f7844b1c5760. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELV42500263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdafd2bd71963e2fadb600a2790d0e352923db004359b8bd5cf42527d47fae79. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELV42500275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb775c36261a12a5b83edbd1f7475ee3ecb6ea11cd3274eded209f7844b1c5760. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELV42500263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0af9ea60f93a6df9ec8ff6b67d80b78f6d029978dfce3b576bb3239e0728e8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6QE2317665.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch